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Question: A study is conducted to determine if time of day has any effect on test grades. An introductory psychology class is selected for the study, because it has a standard curriculum taught across many sections. Two classes are selected for each time period: 8:00 AM, 1:00 PM, and 5:30 PM. Out of the total pool of around 40 students for each time period, 15 students are selected at random, for a total of 45. The test is administered to all students, and the test results for the study subjects are placed in SPSS. We want to know if there is a statistical difference between these time periods. What test is appropriate?
in a study of 10 insurance sales representatives from a certain large city the average age of the group was 48.6
It was found that the correlation is about .80 and the regression equation is handspan = 3 + 0.35 height What is the predicted handspan for someone 5 feet tall?
What would be your recommendation to the local Farm Bureau for estimating the average loss of production per acre, given the data you have at hand?
Which is relatively better: a score of 81 on a psychology test or a score of 56 on an economics test? Scores on the psychology test have a mean of 87 and a standard deviation of 9.
suppose xis a random variable with mean -5 and variance 2. what can you say about the probability that x deviates from
There are k types of distinct postcards. How many ways are there to send these postcards to n friends? (Each friend can get zero cards, also multiple copies of the same card.)
finnish furniture manufactures tables in facilities located in three cities-reno denver and pittsburgh. the tables are
A loan application is received this morning. What is the probability that:
suppose you know there are four letters in a certain password. Also you know three of the four letters but are not certain of the correct order. What is the number of possible passwords you must consider?
He is sorry but there is a 99.9% (1-0.001) chance that you have HIV. Is he correct? What is the actual probability that you are HIV positive?
The route used by a certain motorist in commuting to work contains tow intersections with traffic signals. The probability that he must stop at the first signal is 0.4, the analogous probability for the second signal is 0.5. and the probability th..
Obtain the Normal Equivalent Deviates corresponding to the observed values of X and use these to produce a Q-Q plot. Does your plot indicate that these data are consistent with coming from a Normal distribution?
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